Telegraph-sounder circuits.



s;. VOORHIES. TELEGRAPH SOUNDER CIRCUITS. APPLICATION FILED MAR.11,1918.

1",.296-,142. Patented Mar. 4,1919.

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Inven for Sylvesfr l/oorhles by THE mum: Mums my, mmmumo. minimum". a. c

sYLvEs'rnn vooninns, or ENfiE RIDI N, NORTH DAKOTA.

Tolalltohom it may concern: I

Be it known that-I, SYLvns'rnR VOORHIES,

a citizen of theUnited States, and a resiings on its actuating coils,one of which is:

energized from a local circuit and the other of which is energized from.the main line circuit. i

With these and incidental objects in view the invention consists ofcertain novel features of construction and combination of parts, theessential elements of which are hereinafter described with reference tothe drawingwhich accompanies and forms a part of this specification.

In the drawing Figure 1 is a side elevation of a common type of sounderhaving means for applying my invention thereto, and Fig. 2 is aschematic circuit drawing showing the connections of sounder, relay,battery, etc.

In the sounder shown in Fig. 1 the sounder bar 1, of ordinaryconstruction, carries atits rear end a flexible spring 2 adapted to makecontact with a screw 3 carried by the guard post 4 mounted with the restof the sounder on the insulated base 5.

' The guard post is brought around into a horse shoe bend as at 6 toserve as a guard for the flexible spring 2, and each one of the pair ofcoils 7 and the contact connections are brought out to suitable bindingposts carried on the insulating base 5.

Referring to the schematic circuit shown in Fig. 2, the west line willcome in at 8 and the east line at 9, the battery connections being suchthat the main line current will charge the storage battery 10 while themain line circuit is closed, this charging circuit being as follows:

From the point 8, wire 11, relay coil 12, wire 13, main line soundercoils 14, wire 15, storage battery 10, to the east going line at 9.

When themain line circuit is opened by an operator taking control of theline, there- I Specification of Letters Patent, Application med March11, 1918. serial No. 221,841.

TELEGRAIH-SOUNDER IRGUI'1 S.

Patented Mar. 4, 1919.

after by the closing of his key, he will close the mainline circuit justtraced, and in additionwill close the following circuit:

Storage battery 10, wires 16, 17, contact 18, wire 19, local soundercoils 25, contact 26, wires 27 and 28, to the other side of thestoragebattery 10.

The storage battery will then actuate the sounder bar through the coils25 strongly, so as to give the proper sound to the instrument, and whenthe sounder bar has moved a certain distance, the contact 26 will beopened, permitting the sounder bar to be held down, or the remainder ofits travel downwardly to be effected by the main line coils 14 in themain line circuit heretofore traced.

The relay will, of course, follow the key in the usual manner, and thesounder bar will repeat the signals in the usual way, the local coils 25and the storage battery 10 furnishingthe necessary energy for giv ingthe sounder bar the proper sounding blow/f An additional contact 29 iscarried by the relay, and through wires 17 and 15 on the one side andwires 30 and 13 on the other side, short circuits the main line soundercoils 14 when the contact is closed.

This is to prevent the actuation of the main line sounder coils 14becoming sluggish or non-responsive when there is considerable leakageon the main line.

The relay is, of course, as usual, adjustable to meet just suchconditions, but it is not thought advantageous to make the sounderadjustable and hence the main line coils are short-circuited by the backcontact of the relay for the purpose stated.

While I have described my invention and illustrated it in one particulardesign, I do not wish it understood that I limit myself to thisconstruction, as it is evident that the application of the invention maybe varied in many ways within the scope of the following claims.

Claims:

1. In a telegraph sounder circuit the combination of a sounder having alow resistance winding and a high resistance main line winding, anarmature controllable by said windings, a contact controlled by saidarmature, a main line relay having a con tact, a storage battery,circuit connecting means for including said storage battery in serieswith a main line circuit, and circuit connections including said twocontacts for connecting said storage battery across said low resistancecoil.

2. In a telegraph sounder circuit the combination, With a main linecircuit having a direct current flow, of a storage battery connected inopposition to said current flow, a relay Winding in series with saidstorage battery, a sounder having a main line Winding and. a localWinding, said main line winding being in series with said relay windingand said storage battery, a circuit closingcontact and a circuit openingcontact in series with said storage batteryand said local .windingwhereby, on the :actuation of said circuit closing contact, said storagebattery is connected across said local coils, and upon the lateractuation of said circuit opening contact said storage battery is cutofl' from said local coils.

3. In a relay sounder circuit the combination of a telegraph sounder, astorage bat- .tery and a relay, a circuit for connecting said storagebattery into charging relation with .a main line circuit, andcooperating circuits for utilizing said storage battery to partiallyoperate said sounder andalsorto utilize the mainline circuit connectedtherewith for partially operating saidinain line sounder.

4. A telegraph sounder. circuit comprising a sounder, having two or morecoils, a storage battery, a main line circuit having-a,

battery connection for charging said storage battery normally, circuitchanging means for switchingsaid'batteryfrom a chargingcircuit,.including the main line circuit, to a discharging circuitincluding a coil of said sounder, and means for short-circuiting one "ofsaid sounder coils to prevent line current 40 leakage through theconvolutions thereof.

0. In a telegraph sounder circuit'comprising a sounder having "alocalcoil and a main line 'coil, :a storagebattery, a main line :cir-

cuitdiaving a battery 1 connection forrnormally charging said storagebattery, a' relay, circuit connections. controllable by said relay for;s-witching said storage @battery" from a a charging circuit, vincluding 1" the l-ll'lalll line circuit, to a dischargingicircuit.includingsa coil of said sounder, and a circuit. 'icontrollableby. saidrelay 1 for shortecircuiting said main line coil ofsaidosounderrtoprevent line current leakage through the convolutions thereof.

6. In a telegraph sounder circuit thecombination'of a sounderhavingearlocal coil and a main line coil, 1a .relay,xa" local: battery,av circuit controlled'bysaidmelay ior. actuating said local coil bysaidlocal battery,i.andi60 a circuit controlled-rrbyy-;sari'dz relayswarmcircuiting said main line mails to :rpreyent line current r leakagethrough h theconvolutions thereof. 7

l srnvnsrnavooarnns Copies of this patent may be obtained tor fivecentseacluby addressing the"flommissihnermf:Patents.

washington, 1330; a

